Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Re: wireless help
-Use phone to Control a door
-1. 1Hardware Soultions:
>>1.1.1 U can use MT5087 as a DTMF transfer and use MT8870 as
a receiver;
>>1.1.2 U can use MT8880 as transfereceiver, and u must use
MCU such as 51 or PIC computer to control it;
>>1.1.3 Buy a MODEM to generate DTMF...
-Power line communciations
-1.1 Transmitter
|Send Data|-->| NE555|-->|LC Amplify|-->|Induc couple|-->|Capac couple|--> |Power line|
-1.2 Illusition
-1.2.1 NE555 modulates signals 0/1;
-1.2.2 LC circuits are used to amplify signals and couple signals
to another induction which is link to...
38khz lm567
-Sending methods:
1. Using NE555 to modulate 38KHz signal;
2. Using CMOS IC or TTL circuits to create 38KHz signal, eg. not gate CD4096;
3. Using MicroComputer such as AT89S51 to create 38KHz sigal;
4. Using professional IC to create 38KHz signal, such as TV remote...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
